Automatic stop for gramophones



one o. secrets, or TACOMA, wesnmetroiv. '2

,AUroivrA Io s'ror soeen'eiaornonns.

Specificationof Letters Patent. Patented lJfl ly 1 922 Application filed ts a, 920. SerialHo. $7 7,931. 1

To all whom it may concern:

Be it known that I, OLE O. SronLn, a Cit l1 zen oi the United States,residing at Tacoma,

in the county of Pierce and State otWashington, have invented certain new and use ful Improvements iirAutomatic- Stops for (iramophones, of which the ilollowing'isa specification, reference being had to the accompanying drawing, forming a part 61611501 i The main objects of thisinvention' are to anton'i'atically stop such machines upon the completion of the reproduction of records of different lengths without the necessity of adjusting the stop mechanism for each record; and generally to simplify and improve the construction and operation of stops of this class. f

It consists in the construction, arrangement and combination of parts as herein after particularly described and pointed out in the claims. In the accompanying drawing like char acters designate the same parts in the sev eral figures. I I

Figure 1 is a plan view of anautomatic stop embodying the invention as applied to a gramophone, parts of'which are shown; liig. 2 is a vertical section on the line 2 -2, Fig. 1; and Fig. 3 i's aplan View, similar to Fig.1, showing the brake appliethand the brake releasing mechanism in f a (lit ierentcondition from that shown in Fig. "1. In the drawing 1 designates the top board or plate of a graniophone case, tot-he under side otwhich the motor (not shown) is usually fastened, 2 the turn table, 3 the rotary spindle on the upper end of which the turn table is removably mounted, 4; a. record disk shown in Fig. 2 in position for reproduction, 5 the tone or stylus arm carrying the sound box 6 and needle or stylus 7, all of which are or may be of the usual construction, arrangement and modeof operation.

The stop comprises a brake and brake releasing mechanism. The brake is mounted on a plate 9, which is fastened in proper position to the top board1 underneath the turn table.

The brake controlling and releasing mechanism is mounted on a late 11,'which is thistened to the under si e of the top board 1 below an opening therein;

The brake consists of a lever 13, pivotally mounted or fulcrumed on the plate9 and provided witlia shoe or" paid. 14 of leather or othersuitable material torengagement with the'depending rim of the turn table 2.

One arin 15 of the brake lever, which is of angular or elbow shape, projects outwardly between the top board 1 and run of the'tu'rn table, and serves as a handle for manual operation of the brake.

The plate 9 is formed or provided an upwardly projecting lug 16, which serves as a stop, by engagement with the handle arm 15 ofthe brake lever, to limit themove ment of the brake shoe or pad 14.- away from the rim of the turntable, as shown liiFig.

1. A spring 17, connected at one end by a other end with a stud19 projeoting upwardly from the plate 9, tends to hold the link 18 with theb'rake lever '13, and at the brake in its off position, as shown in Fig. 1,

and when it is partiallyturned from that position, to instantly carry theshoe or pad 14 into engagement with the rim of the turn table, therebyapplyin'gth'e brakeandfstop- I,

ping the machine.

Thebrake releasing mechanism comprises a rotary trip, wliichhsshown, c'onsistsof a stud21 pro ecting upwardly from .agear22 journaled on a; stud 23 on the plate 11 and meshing with' 'a pinion 24 on the spindle 3.

The plate 11is formed or provided with a "box or bearing 26, fittingthe spindle 3 below thepinion 24 and :thus.determining the position of .the gear 22' to properly mesh The box 01-1 bearing 26' with the pinion. may, as shown in Fig. 2, extend downwardly and fit into an opening in the topof the 1 motor case or frame 27. ,7

A horizontally swinging arm or supporting member 29 is pivotally mounted on a stud 30, fastened to and projecting upwardly inwardly towards the gear 22. It is formed or provided at its free end with a curved wiper arm 31, extending over the gear 22 normally into the path of the trip'stud 21. It is also l'ormed or provided further from the center of the gear 22, generally opposite but in a higher plane than the arm 31, with end inwardly towards the gear. An adjustable stop screw 34:, threaded'in'a bracket 35 from the plate ll, and extends therefrom a stop arm 82, which iscurvedat its free fastened to the plate'll, isarranged tolimit. I

the movement of the arm or support 29, and with it, themovement of the wiper arm 31 towards the path oft-he trip or stud21; A

spring 36 tends to hold the arm or support 29 against the stop screw 34. A lever having three arms, 38, 39 and 40, is fulcrumed or pivotally mounted on and carried by the arm or support 29. The arm 39 extends over the gear 22 normally into the pat-h of the trip or stud 21, as shown in Fig. 1. A thrust bar or brake releasing member 42 is pivotally connected at one end wit-h the brake lever 13 and extends inwardly therefrom over the stop arm 32, on which it loosely rests and from which it extends inwardly and downwardly over the gear 22. Adjacent its inner end it is formed with an offset shoulder 43, which is movable into and out of the path of the trip stud 21. The bar 42 is connected by a link 44 with the long lever arm 38, and is provided with a pin 45 which projectsdownwardly therefrom between the arms 31 and 32, which limit the movements of the inner shouldered end of the bar towards and from the center of the gear 22.

A friction segment or wiper 47 is fastened to the tone arm 5 and movable therewith over the turn table 2, into and out of position to engage with the short lever arm 40, the working edge or face of the segment or wiper adjacent the end which first engages with the lever arm 40 as the tone arm swings inwardly over the turn table, being more sharply curved or inclined towards the axis on which the tone arm swings.

In the operation of the stop thebrake being applied as shown in Fig. 3, a record 4 pla :ed on the turn table as shown in Fig. 2, and the tone arm 5 swung into position to enter the stylus '7 in the outer turn of the record groove, the segment or wiper 47 is withdrawn from contact with the lever arm 40, and the arm or support 29 is held by the spring 36 against the stop screw 34. y

The brake being thrown by the handle 15 into its off position as shown in Fig. 1, and as indicated by dotted lines in F ig. 3, the turn table with the record thereon is rotated as indicated by an arrow on Fig. 1. and the tone arm 5 with thesegment or wiper 47, is slowly swung inwardly over the record.

With the rotation of the record and turn table, the gear 22 is turned at a slower speed in a reverse direction, as indicated by an esaid arm with the arm 29 and the lever mounted thereon, momentarily away from the center of the gear and from the stop screw with each revolution of the gear, thereby shifting the shoulder 43 into the path of the trip stud. the trip stud clears the arms 31 and 39, the arm or support 29 is shifted backto its former position against the stop screw 34, thereby carrying the shoulder 43 inwardly out of the" path of the trip stud.

is the stylus T approaches the end of the record groove, the segment or wiper 47 is brought into engagement with the lever arm 40, thereby swinging the arm or support 29 into and holding it in the position in which it is shown in Fig. 1. The segment or wiper 4'7 engaging with the lever arm 4.0, turns the lever arm 38 inward, and through the link 44 shifts the inner end of the thrust bar 42 with the shoulder 43 inwardly out of the path of the trip stud 2-1, as shown in Fig. 1. lVith each revolution of the gear 22 the trip stud 21, after passing the shoulder 43, engages with the lever arn'i 39, and turns it with the arm 38 and the thrust bar 42 outward, as indicated by dotted lines in Fig. 1. The shoulder 43 is thus shifted temporarily into the path of the trip stud 21. with each revolution of the gear, but asthis occurs after the trip stud has passed the shoulder 43, it will have no effect on the brake.

\Vhen the stylus reaches the end of the record groove and the inward movement of the tone arm 5 with the segment or wiper 47 is arrested, the inner end of the thrust bar 42 with the shoulder 43 will be left in the revolution of the gear 22, will engage with the shoulder and push the thrust bar lengthwise outward, thereby turning the arm of the brake lever 13 which carries the pad or shoe 14- outward till the pivot connection between the. link 18 and the handle arm 15 of the lever is shifted inwardly beyond a straight line passing through the fulcrum of the lever and the stud 19. The spring 17 As soon however, as

then instantly throws the shoe or pad 14 into engagement with the rim of the turntable, and stops the machine. This action of the spring in applying the brake and shifting the thrust bar. 42 outward, carries the pin 45 into contact with the curved arm 32, and thereby shifts the shoulder 43 at the inner end of the thrust bar inwardly out of the path of the trip stud 21, as indicated by dotted lines in F ig. 3, and permits the trip stud to pass into engagement with the wiper arm 31, as shown by full lines in 3. The engagement of the trip stud with the. arm 31 as the brake is applied and the machine is stopped, shifts the arm or support 29 out of engagement with the stop screw 34 and carries the short lever arm 40 out of engagement with the segment or wiper 47, thus leaving the segment or wiper to be swung with the tone arm 5 outwardly into position for replacing or repeating a record, without dragging on the arm 40.

Various changes in minor details of 0011.

struction and arrangement of parts may be made without departure from the principle and scope of the invention as defined in the following claims.

I claim: I

1. In an automatic stop for gramophones the combination with a brake and means for releasably holding the brake in oii position, of a trip adapted to be rotated by the rotation of the turn table, a brake releasing member movable into and out of the path of the trip, a pivoted support adapted in normal position to hold the releasing memher in inoperative position, a lever carried by said support and connected with the releasing member, and a member movable with the tone arm of the gramophone and tending by engagement with said lever to shift the releasing member out of operative position as the tone arm swings inwardly over a record, the trip being adapted by engagement with said lever to periodically shift the releasing arm into operative position while the turn table rotates.

2. In an automatic stop for gramophones the combination with a brake and means for releasably holding the brake in off position, of a trip adapted to be rotated by the rotation of the turn table, a brake releasing member movable into and out of the path of the trip, a pivoted support adapted in its normal position to prevent engagement of the releasing member with the trip, means tending to shift said support into and to hold it in its normal position, a levercarried by said arm and connected with the releasing member, and a wiper adapted to be connected and to move with the'tone arm and tending by engagement with said. lever to shift the releasing member away from the path of the trip as the tone, arm swings inwardly over a record, the trip being adapted on each revolution thereof to engage with said lever and shift the releasing member into the path of the trip, and after actuating the releasing member to engage with the lever support ing arm and shift the lever therewith and hold it out of engagement with the wiper.

3. In an automatic stop for gramophones, the combination with. a brake and means for releasably holding the brake in off position, of a pinion on the turn table spindle, a gear meshing with the pinion and provided on one side with a trip stud, a thrust bar pivoted at one end to the brake and movable at the other end into and out of the path of the stud, a pivoted support yieldingly held in normal position in which it holds the thrust bar out of the path of the stud, a lever carried by said support and connected by a link with the thrust bar, and a wiper connected and movable with the tone arm and adapted by engagement with said lever as the tone arm swings inwardly over a record, to shift and hold'said support out of its normal position and to shift the thrust 7 0 bar out of the path of the stud, the stud on said gear being arranged to engage with the lever and shift the thrust bar into the path of the stud with each revolution of the gear. i In an automatic stop for gramophones, the combination of a brake lever, a spring connected therewith and adapted to hold the brake in oif position and to apply'it when it is partially shifted from that position, a trip adapted to be rotated with the rotation of the turn table, a thrust bar pivoted at one end to the brake lever and movable at the other endinto and out of the path of'the trip, a pivoted support adapted in normal position to hold the thrust bar out of the path of the trip, a stop for limitingthe movement of said support towards the path of the trip, a spring tending to hold said support against said stop, a lever carried by said support and connected with the thrust bar, and a wiper connected and movable with the tone arm and tending by engagement with said lever to shift the thrust bar out of the path of the trip as the tone arm swings inwardly over the turn table, the trip being adapted on each revolution thereof afterit has cleared the thrust bar to shift the same back into the path of the trip, and when the inward movement of the tone arm is arrested and the thrust bar is left in the path of the trip, to engage with and actuate the thrust bar and partially shift the brake from its off position till the spring becomes effective to apply it. I

5. In an automatic stop for gramophones, the combination with a brake and means for releasably holding the brake in off position and applying it when released, of brake releasing mechanism comprising a pinion on the turn table spindle, a gear meshing with'llo the pinion and a stationary plate on which the gear is mounted having a bearing fitting the spindle anddetermining the proper relation of the gear to the pinion. I

In witness whereof I hereto affix my signature.

OLE o. STORLE. 

